Roughing machine



FEOUGHING MACHINE 4 Sheets-Sheet 1 Filed Aug. 22, 1940 Sept. 1942. c. G. BROSTROM ROUGHING. MACHINE 4 Sheets-Sheet 2 Filed Aug. 22. 1940 I P 1942- c. G. BROSTROM 2,296,836

4 ROUGHING MACHINE Filed Aug.. 22, 1940 4 Sheets-Sheet 3 Sept. 29, 1942. c. G. BROSTR OM ROUGHING- MACHINE Filed Aug. 22, 1940 4 Sheets-Sheet 4 Patented Sept. 29, 1942 S'iTEE 'i' OFFIQE EOUGHENG MACHINE Application August 22, 1940, Serial No. 353,708

12 Claims.

This invention relates to roughing machines and is herein described as embodied in a machine for roughing the margins of outsoles to prepare them for cement attachment to shoes.

It is the object of the invention to provide an outsole roughing machine which will operate with speed and precision upon soles of all sizes, shapes, thicknesses and marginal bevels, and will produce a uniform, evenly roughened surface upon leathers of all qualities and degrees of hardness.

With this object in View, I have provided a universally adaptable sole feeding mechanism which adjusts itself to the thickness of the work presented to it and feeds the work continuously while maintaining its periphery in contact with a pair of edge gages which are spaced a short distance apart, means being provided to adjust the force with which the work piece is pressed against the edge gages, as may be necessary in handling leather which is hard or soft, thick or thin, and to present the work piece properly to the roughing tool regardless of whether or not the margin of the work is beveled.

In order to operate successfully and accurately upon hard as well as soft leather, I employ a rigid roughing tool which is provided with a large number of sharp teeth and is driven at high speed. This tool is preferably substantially cylindrical, and is rotated about a horizontal axis, the tool shaft being mounted for rotation in a bearing member which is yieldingly urged in the direction of the work by a spring, or the like, so that the tool is drawn into engagement with the work with the proper amount of pressure but can yield to accommodate different thicknesses of material. The axis of the tool is disposed transversely to the direction of feed of the work, with the result that a definite stripe or band having a width equal to the length of the roughing tool is produced upon the sole margin. This roughened stripe or band may extend to the edge of the sole or may be spaced inward from the edge, depending upon the relation between the tool and the edge gages.

The foregoing and other features of the invention will now be described in detail as embodied in an illustrative machine shown in the accompanying drawings, in which Fig. l is a View of the machine in front elevation;

Fig. 2 is a view in side elevation showing the principal mechanisms;

Fig. 3 is a plan View, partly in cross section von the line III-III of Fig. 2;

Fig. 4 is a plan view of the sole supporting and guiding parts;

Fig. 5 is an angular View showing the edge gages and sole supporting elements at the operating position; and

Fig. 6 is a plan viewillustrating diagrammatically the effect of various adjustments of the work feeding mechanism.

In the drawings, It indicates the frame of the machine, which may rest upon a bench or a standard. Secured to the frame It] is a bracket it; in which are mounted a pair of pivots I4 (see Fig. 2) supporting the rear portion of a long bearing member IS in which is journaled the tool shaft 18. A cylindrical roughing tool 20, the circumference of which is provided with a large number of sharp teeth, is secured on the shaft E8 by a nut 22, and such tools of different lengths may be readily interchanged to provide for roughing bands of different widths upon a sole. The pivotal mounting of the member it near its rear end permits the tool to yield upward as required by the thickness of the material being operated upon.

A lug 24 extending downward from the bearing member 56 is connected by a spring 2% to a horizontal arm 28 (Fig. 2) of a bell crank lever which is pivoted at 36 (Fig. 1) in a stationary bracket 32 secured to the base of the frame It. An upright arm 35 of the bell crank lever engages the end of a thumb screw 36 which is threaded through the bracket 32 and may be used to adjust the tension of the spring 25, which yieldingly urges the tool 26 toward the work. A stop screw 38 threaded into a stationary gear box it serves to limit adjustably the extent to which the tool shaft bearing member it can be depressed, and thus the tool may be prevented from engaging the sole support immediately beneath it.

In order to raise the bearing member it against the tension of the spring 26, a horizontal arm E2 of a bell crank lever, movable about a stationary pivot it in the bracket I2, is connected to the lug 25 by a pivot E6; and a depending arm 68 of this bell crank lever is connected by a link 59, including a turn-buckle 52, to a rocker arm 5d secured to a shaft 56 which is journaled in a stationary block 58 upon the'base of the frame is, Also secured to the shaft 56 is an arm Bil *connected by a treadle rod 62 to a treadle (not shown). Through the described train of connections, depression of the treadle rod 62 will cause the tool 20 to be lifted when it is desired to insert a work piece in the machine.

Directly beneath the tool the marginal portion of the sole is supported by a horizontal rotary disk 64, part of the circumference of which is embraced by a stationary block 66 having a depending shank 68. A tongue and groove connection I8 (Fig. 4) between the shank 68 and the upper portion of the gear box 48 permits vertical adjustment of the block 66 by means of a screw 12 threaded through a lug 14 projecting laterally from the shank 68, and a screw 16 serves to secure the block in adjusted position.

The disk 64 is provided with a central, up-

wardly extending, corrugated or roughened circular stud 18 which constitutes one of the two edge gages and also aids in the work-feeding operation by reason of the engagement of the corrugated, rotating stud with the edge of the sole.

The disk 64 is secured to the upper end of a vertical shaft 88 journaled in the gear box 48 and having affixed to its lower end a skew gear 82 which meshes with a similar skew gear 84 secured on the forward end of a horizontal, driven shaft 86.

The sole is additionally supported by a yieldingly mounted block 88, having a sloping upper face 98, which is positioned in front of the tool 28. A disk 92 mounted to rotate freely upon a stud 94 secured in the block 88 engages the under face of the sole and, while permitting the sole to be advanced without appreciable friction, supports a portion of the sole which is not directly beneath the roughing tool. One or more spacing washers 96 interposed between the disk 92 and the block 88 allow the disk to be positioned in proper relation to roughing tools of different lengths.

The block 88 has a depending stem 98 which is guided for vertical movement in a guide I88 secured to the base of the frame I8. A collar I82 secured to the stem 98 limits the upward movement of the latter. The stem 98 is surrounded by a compression spring I84, the upper end of which bears against the collar I82 and the lower end of which bears upon an adjustable bushing I86 threaded through the guide member I88 and serving to regulate the tension of the spring. To the lower end of the stem 98 is adjustably secured a dog I88 in a position to be engaged by the tip II8 of the treadle actuated arm 68 so that when the treadle rod 62 is lowered, the supporting block 88 will be lowered, against the tension of the spring I84.

At one side of the operating position, the sole is supported by a stationary feed plate II2 having an upwardly projecting pin II 4 which constitutes the second edge gage. The plate H2 is secured to a block II 6 (Figs. 4 and which is in turn mounted upon a base member I I8 in relation to which the block can be adjusted transversely of the plate II2 by means of an adjusting screw I28, a clamping screw I22, passing through a slot I23 in the block II6, being provided to lock the parts in adjusted relation.

The base member II 8 is secured to a portion I24 of the machine frame I8 by a screw I26 which passes through a slot I28 in the said member and permits the entire assembly of base member II8, block H6 and feed plate II2 to be adjusted in a direction at right angles to that of the adjustment effected by the screw I28.

Cooperating with the feed plate II2 to effect and control the feeding of the sole to the roughing tool, is a feed disk I 38 which is affixed to the lower end of an inclined spindle I32 journaled for rotation in a bearing support I34 and having near its upper end a bevel gear I36 through which the spindle and feed disk are driven.

The bearing member I34 has an upwardly projecting portion I38 through which passes an upright stationary shaft I 48 held in a split portion of a yoke I42 by a clamping screw I44. The middle portion of the bearing member I34 is also split and is clamped upon the lower end of the shaft I48 by a clamping screw I46. As a result of this arrangement, angular shifting of the bearing member I34, I38 about the vertical axis of the shaft I48 is permitted by loosening either of the clamping screws I44, I46, and it and the feed member carried thereby can then be secured in adjusted position by tightening the screw. The purpose of this adjustment is to change the direction in which the feeding force applied by the feed disk I38 is exerted upon the work.

Loosely surrounding the shaft I48 is a pinion I48 which meshes with the gear I36 and which is integral with a bevel pinion I58 meshing with a bevel gear I52 secured to a shaft I54 journaled for rotation in a sleeve I56 rigid with the yoke I42. The sleeve I56 is clamped in a split portion I58 of an arm I68 by means of a clamping screw I62. The arm I68 is mounted to swing in a vertical plane about fixed pivots I64, I66 which are clamped in the bracket member I2; and extending downward from the arm I68, and rigid therewith, is a lever I68 the rear face of the lower end portion of which engages the head of an adjust able stop screw I18 threaded into the frame I 8. The lower end of the said lever is also connected by a link I12, including a turn-buckle I14, to the rocker arm 54, with the result that when the treadle rod 62 is depressed, the arm I68 and the feed disk and operating mechanism carried by the arm are raised. A spring I16 having its lower end connected to a stationary anchoring pin I18 and its upper end connected to a screw I88 passing through a portion of the arm I68 and surrounded by an adjustable thumb nut I82 tends at all times to lower the arm I68 and, consequently, th feed disk I38.

The shaft I54 is driven from a sprocket I84 mounted upon a shaft I86 and connected to the shaft I54 through universal joints I 88 and I98.

In order to aid in holding the extreme marginal portion of the sole flat upon the feed plate and to prevent the sole edge from being rolled up by pressure of the sole against the edge gages, I provide a presser foot I 92 which extends beneath the inclined feed disk I38 at a point as close as possible to that at which the disk engages the upper face of the sole and is pivoted at I94 to a bracket I96 which extends forward from a vertical bar I98 clamped in a transversely adjustable block 288 secured by a screw 282 to the yoke I42. The tail portion 284 of the presser foot member I 92 is connected by a pull spring 286 to an anchoring pin 288 secured to the upper part of the bar I98. The tension of the spring 286 is such as to cause the presser foot I92 to exert sufiicient pressure upon the marginal portion of a sole passing beneath it to aid very materially in keeping the said marginal portion flat, a function which is particularly valuable when operating along the shank portion of a sole the edge of which is frequently reduced to such thinness that it is easily rolled up when the edge of the sole is pressed forcibly against the edge gages.

When a sole is inserted between the feed plate H2 and the feed disk I38 with the sole edge against the edge gage II4, rotation of the disk will cause the marginal portion of the sole to be advanced over the plate H2, the disk 64 and the block'liii beneath the roughing tool 26. The bearing member I34 is so adjusted angularly about the axis of the shaft Mil as to cause the feed disk ltil to have considerable so-called cross feed effect upon the sole, that is to say, the feed disk exerts force upon the sole in a direction which may be resolved into two components, one of which is in the direction of feed along past the two edge gages, and the other of which is in a direction tending to force the sole edge against the gages. This mechanism operates to feed the sole automatically without any necessity for manual aid or guidance by the operator.

When the sole is engaged by the roughing tool 23, the latter, which is running at very high speed, has a tendency to seize the sole and throw it quickly out of the machine cumstances, the feed disk E33, which is positively driven at a relatively low speed, has a retarding rather than advancing effect on the sole, and holds the speed of the latter down to the normal rate of feed while the tool 23 is performl ing the roughing operation.

In order to aid in supporting the sole in proper relation to the roughing tool, I have provided a table 2H] which is sufficiently below the level of the disk 6 and the block 68 to permit the provided on top of the table 2M and is set at such a distance from the edge gages that the sole will ride upon it and be supported in a nearly horizontal position when the roughing tool is operating around the forepart of the sole, where there is little or no bevel, but will drop off when the steeply beveled shank portion of the sole reaches operating position. In Fig. 4, a sole S is shown in broken lines in the position relative to the auxiliary support 2l2 which it assumes as the shank portion of the sole approaches the roughing tool.

In Fig. 6, the position of the feed disk lac relative to the roughing tool 20 is indicated in three difierent angular adjustments of the bearing member [34 about the axis of the vertical shaft The roughing tool shaft l8 and the driving shafts 86 and [54 for the rotary disk 65 and the feed disk i330 respectively may be driven in any convenient way, the only essentials being that the tool shaft [8 be driven at high speed and that the shafts 8'5 and Hi l be driven at suitably low speeds to cause the sole to be advanced at the proper rate. As shown, the sprocket 84 is connected by a sprocket chain, indicated by dotand-dash lines 254, to a sprocket 2H3 (see Figs. 2 and 3) to which is affixed a gear 2l8 meshing with a gear 225 secured to the shaft 36. A large gear 222 also secured to the shaft 86 and to the gear 220 is rotated by a pinion 224 upon a shaft 226 driven from a suitable source of power. The shafts 85 and I 1 are thus kept in synchronism and are driven at the relatively slow rate required to feed the work properly to the roughing tool.

To the rear end of the shaft i8 is secured a double pulley 223 connected by a belt 230 (Fig. 1) to a large power driven pulley 232. The belt is omitted from Fig. 2 in order to enable the pulleys to be seen more clearly. Either groove Under these cirof the beveled pulley 228 may be used by reversing the pulley upon the shaft, in order to obtain different shaft speeds, and the pulley 232 is supported by an adjustable arm 234 in order to provide for proper tension of the belt .233 regardless of which end of the pulley 228 is being used.

Having described the invention, what is claimed as new and desired to be secured by Letters Patent of the United States is:

1. In a roughing machine, the combination of a power driven roughing tool, a stationary work support directly adjacent to said tool arranged to support the work against the thrust of the tool, and a yieldable work support adjacent to said stationary work support.

2. In a roughing machine, the combination of a power driven roughing tool, stationary worksupporting means directly adjacent to the tool arranged to support the work against the thrust of the tool, a yieldable work support adjacent to said stationary work-supporting means, and a stationary work support adjacent to said yieldable work support.

3. In a roughing machine, the combination of a power driven yieldably mounted roughing tool, a stationary work support adjacent to the tool, a yieldable Work support adjacent to said stationary work support, and treadle-operated means for retracting the tool and the yieldable work support.

4. In a roughing machine, the combination of stationary work-supporting means over which a work piece may be advanced, a power driven roughing tool yieldably mounted directly adjacent to said work-supporting means and arranged to press the work thereon, and power driven feed mechanism yieldably mounted adjacent to said work-supporting means.

5. In a roughing machine, the combination of stationary work-supporting means over which a work piece may be advanced, a power driven roughing tool' yieldably mounted adjacent to said work-supporting means, power driven feed mechanism yieldably mounted adjacent to said worksupporting means, and treadle-operated means for retracting the tool and the feed mechanism.

6. In a roughing machine, the combination of a power driven roughing tool, a power driven work-supporting disk adjacent to the tool and adapted to be engaged by one face of a work piece, and a roughened circular stud projecting from the center of the disk and arranged to engage the edge of the work piece and aid in the feeding thereof.

7. In a roughing machine, the combination of a power driven roughing tool, two stationary work supports, a stationary edge gage upon one of said Work supports, and a rotatable power driven edge gage adjacent to the other work support.

8. In a roughing machine, a combined work support and feeding device comprising a horizontal, rotatable, power driven disk over which the work may be advanced, and a roughened, circular, vertical stud at the center of said disk adapted to engage the edge of the work and aid in the guiding and feeding thereof.

9. In a roughing machine, the combination of a feed table adapted to support a work piece, an inclined feed disk positioned to engage the upper face of the work piece, and a presser foot positioned in the space between the feed disk and the work piece and arranged to press the work piece upon the feed table.

10. In a roughing machine, the combination of a power driven, rigid, cylindrical, yieldably mounted, roughing tool which is rotatable about a horizontal axis, a power driven work-supporting disk beneath said tool and adapted to be engaged by one face of a work piece, a stud projecting from the center of the disk and arranged to engage the edge of the work piece, and mechanism for feeding the work piece over said Worksupporting disk transversely to the axis of the tool.

11. In a sole roughing machine, the combination of a power driven roughing tool, a narrow, vertically stationary sole support beneath the tool, an edge gage beside the tool, a stationary table below the level of said sole support, and an arcuate supporting block so mounted upon the table as to permit said block to be positioned at such a distance from the edge gage that a sole being operated upon will ride upon the block when the roughing tool is operating around the forepart of the sole but will drop off the block when the shank of the sole reaches operating position.

12. In a sole roughing machine, the combination of a power driven roughing tool, a narrow, vertically stationary sole support directly beneath the tool, a pair of sole edge gages, feed mechanism properly related to the edge gages and the tool to feed the marginal portion of a sole automatically and progressively beneath the tool, a table positioned below the level of said sole support, and an adjustable, arcuate, auxiliary supporting block on top of the table and adapted to be set at such a distance from the edge gages that the sole will ride upon it and be supported in a nearly horizontal position when the forepart of the sole is being fed beneath the roughing tool but will drop off the block when the shank portion of the sole reaches the roughing tool.

CHARLES G. BROSTROM. 

